Mr Morrison flew back to Australia on Friday having visited the Solomon Islands, the UK and Singapore just weeks after being returned to government.

During the trip he talked up investment and job opportunities flowing from greater engagement with the Indo-Pacific region and Britain.

One of the key planks will be the Regional Comprehensive Economic Partnership, which he and Singaporean leader Lee Hsien Loong have committed to finalising by the end of 2019.

However, new figures this week showed Australia's economy grew at its weakest pace in almost a decade in the year to March.

Mr Morrison says there has been some "uncertainty" in the Australian economy.

But he took a "clear plan" to the May 18 election including income tax cuts, to be put to the parliament when it opens in July, as well as infrastructure spending.

Asked on the ABC whether he was open to further stimulus should the economy falter, Mr Morrison said: "We are a pragmatic government that believes in ensuring we have a strong economy."

"We will always be taking decisions that strengthen our economy - that is why you have budgets, that's why you have budget updates at the end of the year.

"They are your opportunity to constantly scrutinise how the policies are working and what other measures you may need to take."

Australian Associated Press